It's good to express your emotions but don't lose control!
In an interview situation it’s always good to express yourself and to convey your feelings, however there is a limit. You don’t want to put yourself in a situation that causes you to become over-emotional and perhaps lose control – this could jeopardise the success of your whole interview.
In order to avoid this, think about the kind of things that you may be asked about in an interview that could cause you to get emotional – a pet that died recently, an exam you failed, an argument you had with a friend. By thinking about them in advance you can mentally prepare yourself to talk about them, or our best advice would be to try to avoid talking on these sensitive subjects altogether and wherever possible answer the question using a different example.